21456720

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{1753}}^1$

素因数の和:1789

約数の個数: 120

約数和(自身を含む): 76341096

約数和(自身を除く): 54884376

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 17, 18, 20, 24, 30, 34, 36, 40, 45, 48, 51, 60, 68, 72, 80, 85, 90, 102, 120, 136, 144, 153, 170, 180, 204, 240, 255, 272, 306, 340, 360, 408, 510, 612, 680, 720, 765, 816, 1020, 1224, 1360, 1530, 1753, 2040, 2448, 3060, 3506, 4080, 5259, 6120, 7012, 8765, 10518, 12240, 14024, 15777, 17530, 21036, 26295, 28048, 29801, 31554, 35060, 42072, 52590, 59602, 63108, 70120, 78885, 84144, 89403, 105180, 119204, 126216, 140240, 149005, 157770, 178806, 210360, 238408, 252432, 268209, 298010, 315540, 357612, 420720, 447015, 476816, 536418, 596020, 631080, 715224, 894030, 1072836, 1192040, 1262160, 1341045, 1430448, 1788060, 2145672, 2384080, 2682090, 3576120, 4291344, 5364180, 7152240, 10728360, 21456720]

約数ペア:

[(1, 21456720), (2, 10728360), (3, 7152240), (4, 5364180), (5, 4291344), (6, 3576120), (8, 2682090), (9, 2384080), (10, 2145672), (12, 1788060), (15, 1430448), (16, 1341045), (17, 1262160), (18, 1192040), (20, 1072836), (24, 894030), (30, 715224), (34, 631080), (36, 596020), (40, 536418), (45, 476816), (48, 447015), (51, 420720), (60, 357612), (68, 315540), (72, 298010), (80, 268209), (85, 252432), (90, 238408), (102, 210360), (120, 178806), (136, 157770), (144, 149005), (153, 140240), (170, 126216), (180, 119204), (204, 105180), (240, 89403), (255, 84144), (272, 78885), (306, 70120), (340, 63108), (360, 59602), (408, 52590), (510, 42072), (612, 35060), (680, 31554), (720, 29801), (765, 28048), (816, 26295), (1020, 21036), (1224, 17530), (1360, 15777), (1530, 14024), (1753, 12240), (2040, 10518), (2448, 8765), (3060, 7012), (3506, 6120), (4080, 5259)]